This is a very old bug. Anna set it back to new in Aug 2016 as it may be 
related to https://bugs.launchpad.net/mos/+bug/1606218, which has been fixed 
since.
Hence I will set this to invalid. If some hits an ssh bug in the gate again, 
please file a new bug.

** Changed in: tempest
       Status: New => Invalid

** Changed in: tempest
   Importance: Critical => Undecided

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https://bugs.launchpad.net/bugs/1298472

Title:
  SSHTimeout in tempest trying to verify that computes are actually
  functioning

Status in Cinder:
  Invalid
Status in OpenStack Compute (nova):
  Fix Released
Status in tempest:
  Invalid

Bug description:
  
tempest.scenario.test_volume_boot_pattern.TestVolumeBootPattern.test_volume_boot_pattern
  failed at least once with the following traceback when trying to
  connect via SSH:

  Traceback (most recent call last):
    File "tempest/scenario/test_volume_boot_pattern.py", line 156, in 
test_volume_boot_pattern
      ssh_client = self._ssh_to_server(instance_from_snapshot, keypair)
    File "tempest/scenario/test_volume_boot_pattern.py", line 100, in 
_ssh_to_server
      private_key=keypair.private_key)
    File "tempest/scenario/manager.py", line 466, in get_remote_client
      return RemoteClient(ip, username, pkey=private_key)
    File "tempest/common/utils/linux/remote_client.py", line 47, in __init__
      if not self.ssh_client.test_connection_auth():
    File "tempest/common/ssh.py", line 149, in test_connection_auth
      connection = self._get_ssh_connection()
    File "tempest/common/ssh.py", line 65, in _get_ssh_connection
      timeout=self.channel_timeout, pkey=self.pkey)
    File "/usr/local/lib/python2.7/dist-packages/paramiko/client.py", line 236, 
in connect
      retry_on_signal(lambda: sock.connect(addr))
    File "/usr/local/lib/python2.7/dist-packages/paramiko/util.py", line 279, 
in retry_on_signal
      return function()
    File "/usr/local/lib/python2.7/dist-packages/paramiko/client.py", line 236, 
in <lambda>
      retry_on_signal(lambda: sock.connect(addr))
    File "/usr/lib/python2.7/socket.py", line 224, in meth
      return getattr(self._sock,name)(*args)
    File 
"/usr/local/lib/python2.7/dist-packages/fixtures/_fixtures/timeout.py", line 
52, in signal_handler
      raise TimeoutException()
  TimeoutException

  Logs can be found at: 
http://logs.openstack.org/86/82786/1/gate/gate-tempest-dsvm-neutron-pg/1eaadd0/
  The review that triggered the issue is: 
https://review.openstack.org/#/c/82786/

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